Carburetor control for motor cars



May 29, 1934- A. w. BARKER ET AL CARBURETOR CONTROL FOR MOTOR CARS FiledJan. 30, 1930 2 Sheets-Sheet l urfy /l/ a Ear/v6 uur am@ May 29, 3934 A.w. BARKER ET AL CARBURETOR CONTROL FOR MOTOR CARS 2 sheets-sheet 2 FiledJan. 50, 1930 FUEL r H. M a mn iw; s Wim y@ UNITED STATES PATENT OFFICECARBURETOR CONTROL FOR MOTOR CARS Aubrey W. Barker and Barrie R. Barker,Glad wyne, Pa.

Application January 30, y1930, Serial No. 424,496

7 Claims.

Objects of the present invention are to eliminate fuel waste through theidling jet or jets when a motor car is coasting down grade with thethrottle closed and the clutch engaged; to effect economy in the use ofgasoline or like iiuid fuel; to automatically cut off the supply fromthe carburetor to the engine when the vehicle is coasting against arunning engine and to permit the fuel to flow to the idling jet onlywhen the motor requires it.

To these and other ends hereinafter set forth or appearing, theinvention, generally stated, comprises means for eliminating fuel wastethrough the idling jet of a carburetor associated with a throttle valveand with an engine intake manifold and clutch, whichinclude a normallyopen valve arranged between the bowl of the carburetor and the Venturitube, an electro-magnetic device, for example, and its circuitconnections adapted to effect closing of the valve, and a circuitcontroller for the circuit connections having an actuating diaphragmexposed to and operated by the high degree of vacuum in the manifoldwhen the throttle is closed and the` clutch engaged, asin coasting. Amechanically connected device responsive to the vacuum in the intakemanifold may also be used.

I'he invention also comprises the improvements to be presently describedand nally claimed.

In the following description reference will be made to the accompanyingdrawings forming part hereof and in which Figure 1 is a diagrammatic andschematic sectional view generally in elevation illustrating features ofthe invention.

Figure 2 isa similar view illustrating a modification of the invention,and

Figure 3 is a diagrammatic view showing a modification which ismechanically operated.

Referring to the drawing, and more particularly to Figure 1, 1 indicatesan idling jet or jet tube. 2 is the throttle valve. 'I'he clutch is notillustrated because it is too well understood to require illustration ordescription. These are the ordinary provisions of a power plant of anautomobile or like vehicle or conveyance. 4 is a normally open valvearranged between the bowl 5 of the carburetor and the idling jet 1 andthe main jet 18. As shown the valve consists of a ball 6 adapted bygravity to normally occupy the cavity provided for it in the passage '1that extends from the carburetor bowl and communicates with the idlingjet passage 1. which, when energized, moves the ball into position forclosing the passage 7 and thus sealing 8 is an electro-magnet oif theidling jet 1 and the main jet 18. The circuit connections for theelectro-magnet are indicated as including the storage battery 9 and theconductors 10 and 11. 12 is a circuit controller and it includes anactuating diaphragm 13 ex- 60. posed to the atmosphere on one face andexposed on the other face to pressure conditions in the internalcombustion engine by Way of the tube or connection 14.

The mode of operation may be described as follows:

With the engine running and the clutch in engagement and the carcoasting, the throttle 2 is closed. Under these conditions there is ahigh degree `of vacuum in the -manifold 3, so that atmospheric pressureon the diaphragm causes it,

'in the present instance by shifting the upper contact of the controller12 into engagement with the lower contact, to close the circuit,yenergize the electro-magnet 8, and close the valve 4, thus preventingfuel :from reaching the idling jet 1 and consequently effecting a savingof fuel. This saving of fuel is quite substantial and in at least oneinstance has amounted to 10%.

The construction and mode of operation of the modification illustratedin Fig. 2 are substantially as above described except that the ballvalve 6a is spring pressed, for example, by the spring 15 into openposition and is closed by the magnet 8a when energized. Furthermore theparts referred to are arranged in a fitting 17 adapted to be mountedthrough the wall of the Venturi tube so that a device embodying featuresof the invention can be applied to existing structures. In thismodification only the idling jet 1 is closed, 90 it being preferable toleave the main jet 18 full of fuel to provide for immediate speeding upof the engine on opening the throttle valve 2.

The modification shown in Figure 3 operates kin the same manner as thepreceding modications save that the valve is mechanically operated fromthe diaphragm 13 instead of being electrically operated. Also in thismodification the valve 6b is placed directly opposite the idling jet 1and may be arranged so as to shut off only the idling jet 1 from thefuel supply passage 7 or to disconnect both the idling jet 1 and themain jet 18 from the passage 7. It is preferable to only shut off theidling jet 1 as then fuel is sup- 105 plied to the main jet 18 when thethrottle valve 2 is opened.

In this modification the diaphragm 13 is connected to the intakemanifold by a pipe 14 as in the preceding modifications. The diaphragm110 13 is also connected by the lever 19 to the valve 6b and actuatesthe valve 6b thereby.

It will be obvious to those skilled in the art to which the inventionrelates that modifications may be made in details of construction andarrangement and matters of mere form without departing from the spiritof the invention which is not limited to such matters or otherwise thanthe prior art and the appended claims may require.

We claim:

l. Means for eliminating fuel waste through the idling jet of acarburetor associated with a throttle valve and with an engine intakeconduit comprising, in combination, a normally open valve arrangedbetween the bowl of the carburetor and the idling jet, anelectromagnetic device and its circuit connections adapted to effectclosing of the valve, and a circuit controller for said circuitconnections having an actuating dia# phragm exposed and responsive to ahigh degree of vacuum in the conduit when the throttle is closed.

2. Means for eliminating fuel waste through the idling jet of acarburetor associated with a throttle valve and with an engine intakeconduit comprising, in combination, a ball valve arranged between thebowl of the carburetor and the idling jet and adapted to open bygravity, an electromagnet and its circuit connections adapted to closethe ball valve when energized, a circuit maker and breaker interposed insaid circuit connections, a diaphragm for normally opening the circuitbreaker, and connections between one face of the diaphragm and theinterior of the conduit.

, 3. In a device for preventing unnecessary consumption of fuel in aninternal combustion en gine, said device including an internalcombustion engine which forms a high vacuum when the engine is turningover under light load or under no load, the combination of a carburetorfor supplying fuel and air to said engine, a throttle valve in saidcarburetor, an idling jet in said carburetor between said engine andsaid throttle valve through which fuel but no air is supplied to saidengine, a valve controlling the supply of fuel to said idling jet, meansresponsive to the degree of vacuum in said engine for closing said valvewhen the vacuum has risen to a predetermined degree without admittingair to said engine, and means for opening said valve when said firstmentioned means is not operating thereby supplying fuel but no airthrough said idling jet to said engine.

4. In a device for preventing unnecessary consumption of fuel in aninternal combustion engine,I said device including an internalcombustion engine which forms a high vacuum when the engine is turningover under light load orunder no load, the combination of, a carburetorfor supplying fuel and air to said engine, an

idling jet in said carburetor through which fuel but no air is suppliedto said engine, a main jet in said carburetor for supplying fuel to saidengine, a valve controlling the supply of fuel to said idling jet andindependent of the supply of fuel to said main Jet; means responsive tothe degree of vacuum in Asaid engine for closing said valve when thevacuum has risen to a predetermined degree without admitting air to saidengine, and means for opening said valve when said first mentioned meansis not operating thereby supplyingv fuel but no air through said idlingjet to said engine.

5. Means for eliminating fuel waste through the idling jet of acarburetor associated with a throttle valve and with an engine intakeconduit comprising, in combination, a valve arranged between the bowl ofthe carburetor and the idling jet and stressed to open position, anelectromagnet and its circuit connections adapted to close the valvewhen energized, a normally open circuit maker and breaker interposed insaid circuit connections, and means responsive to the degree of vacuumin said intake conduit for closing said circuit breaker when the vacuumhas risen to a predetermined degree.

6. In a device for preventing unnecessary consumption of fuel in aninternal combustion engine, said device including an internal combustionengine which forms a high vacuum when turning over under light load orunder no load and a higher vacuum when driven by external means with thethrottle closed, the combination of a carburetor for supplying acombustible mixture of air and fuel to said engine, a throttle valve forcontrolling the normal supply of combustible mixture from saidcarburetor to said engine,

means for introducing air to said carburetor, means for introducing fuelto said carburetor, means for supplying an auxiliary supply ofcombustible mixture to said engine when said engine is under light loador no load, a valve controlling the entire supply of fuel to said lastmentioned means, and means for actuating said valve arranged to closesaid valve while a predetermined degree of vacuum exists in said enginewithout admitting air to said engine.

'1. In a device for preventing unnecessary consumption of fuel in aninternal combustion engine, said device including an internal combustionengine which forms a high vacuum in turning over under light load orunder no load, the combination of, a carburetor for supplying acombustible mixture of air and fuel to said engine, a throttle valve forcontrolling the normal supply of combustible mixture from saidcarburetor to said engine, means for introducing air to said carburetor,means for introducing fuel to said carburetor, means for supplying anauxiliary supply of combustible mixture to said engine when AUBREY W.BARKER. BARBIE R. BARKER.

